Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	$ (75,487)	$ 44,154	$ 60,653	$ 112,632
Other comprehensive income (loss) before reclassifications			(12,617)	(148,381)
Reclassifications into earnings			10,110	23,240
Other comprehensive loss, net of tax	(30,078)	(55,400)	(2,507)	(125,141)
Balances, end of period	(125,109)	(8,276)	(125,109)	(8,276)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			12,503	3,803
Other comprehensive income (loss) before reclassifications			(2,719)	9,832
Reclassifications into earnings			(284)	(417)
Other comprehensive loss, net of tax			(3,003)	9,415
Balances, end of period	9,500	13,218	9,500	13,218
Available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(39,440)	(6,249)
Other comprehensive income (loss) before reclassifications			(4,338)	(36,091)
Reclassifications into earnings			8	(57)
Other comprehensive loss, net of tax			(4,330)	(36,148)
Balances, end of period	(43,770)	(42,397)	(43,770)	(42,397)
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(716,056)	(756,639)
Other comprehensive income (loss) before reclassifications			0	0
Reclassifications into earnings			10,386	23,714
Other comprehensive loss, net of tax			10,386	23,714
Balances, end of period	(705,670)	(732,925)	(705,670)	(732,925)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period			(92,571)	(21,227)
Other comprehensive income (loss) before reclassifications			(5,560)	(122,122)
Reclassifications into earnings			0	0
Other comprehensive loss, net of tax			(5,560)	(122,122)
Balances, end of period	(98,131)	(143,349)	(98,131)	(143,349)
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Balances, beginning of period	(807,993)	(850,053)	(835,564)	(780,312)
Other comprehensive loss, net of tax	(30,078)	(55,400)	(2,507)	(125,141)
Balances, end of period	$ (838,071)	$ (905,453)	$ (838,071)	$ (905,453)